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くだらない, 下らない
1. trivial, trifling, insignificant, not worth bothering with, worthless, useless, good-for-nothing
2. stupid, nonsensical, absurd, foolish, silly
微不足道的,琐碎的,无足轻重的,不值得费心去管的,毫无价值的,无用的,一无是处的
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调